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authorJan Kara <jack@suse.cz>2014-12-19 12:03:53 +0100
committerJiri Slaby <jslaby@suse.cz>2015-02-16 16:10:47 +0100
commit4ff6c40be897225cf818c5202871cfb91ed064f6 (patch)
tree666a56a45ee93a95d78d4ca76176c2c98f6938bb /fs
parentc75789fb19feb86b64d60387f0e6525f05d95b64 (diff)
udf: Verify i_size when loading inode
commit e159332b9af4b04d882dbcfe1bb0117f0a6d4b58 upstream. Verify that inode size is sane when loading inode with data stored in ICB. Otherwise we may get confused later when working with the inode and inode size is too big. CC: stable@vger.kernel.org Reported-by: Carl Henrik Lunde <chlunde@ping.uio.no> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'fs')
-rw-r--r--fs/udf/inode.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 47cacfd2c9af..6ba11cdfbc0b 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -1495,6 +1495,24 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint);
}
+ /* Sanity checks for files in ICB so that we don't get confused later */
+ if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
+ /*
+ * For file in ICB data is stored in allocation descriptor
+ * so sizes should match
+ */
+ if (iinfo->i_lenAlloc != inode->i_size) {
+ make_bad_inode(inode);
+ return;
+ }
+ /* File in ICB has to fit in there... */
+ if (inode->i_size > inode->i_sb->s_blocksize -
+ udf_file_entry_alloc_offset(inode)) {
+ make_bad_inode(inode);
+ return;
+ }
+ }
+
switch (fe->icbTag.fileType) {
case ICBTAG_FILE_TYPE_DIRECTORY:
inode->i_op = &udf_dir_inode_operations;